硅酸盐学报

Nd2O3掺杂对BCZT陶瓷结构及介电性能的影响

作者：徐琴丁士华宋天秀彭勇吴小亮

关键词：氧化钕掺杂介电性能弛豫铁电体

分类号：O482；O614

出版年,卷(期):页码：2013,41(3):292-297

DOI：

摘要：

摘要：采用固相反应法制备Ba0.92–xCa0.08Ndx(Zr0.18Ti0.815Y0.0025Mn0.0025)O3 (BCZT-Nd，x = 0、0.005、0.010、0.020)陶瓷，研究了Nd2O3掺杂对Ba0.92Ca0.08(Zr0.18Ti0.82)O3(BCZT)陶瓷结构及介电性能的影响。结果表明，不同含量Nd3+作为施主掺杂离子进入A位和含量均为0.25 %(摩尔分数)的Mn2+和Y3+作为受主掺杂进入B位均能提高BCZT陶瓷的致密性，细化晶粒作用明显，所有样品均为单一的四方BaTiO3相结构。随Nd2O3掺杂量增加，BCZT-Nd陶瓷介电峰值温度Tm向低温方向移动，相变弥散程度增强，Nd3+含量≥0.005 mol时即表现出明显的弛豫铁电体特征。

Abstract: Ba0.92–xCa0.08Ndx(Zr0.18Ti0.815Y0.0025Mn0.0025)O3 (BCZT-Nd, x = 0, 0.005, 0.010, 0.020) ceramics were prepared via a solid phase reaction. The effect of Nd2O3 doping on the microstructure and dielectric properties of the ceramics were investigated. Nd3+ was selected as a donor substituting for the A site in the presence of Y3+ and Mn2+ as acceptor dopants at the concentration of 0.25% in mole.The results reveal that the co-doped method can improve the density and reduce the grain size of BCZT ceramic. It was indicated that the composition of all samples is single tetragonal phase. The dielectric peak temperature (Tm) shifted toward a lower temperature, and the frequency dispersion became intensive and more pronounced diffuse phase transition behaviors when Nd2O3-doped content increased. The ferroelectric relaxor characteristics were obtained at Nd3+ ion content ≥0.005 mol.

基金项目：

国家自然科学基金(11074203)；西华大学人才基金(R0620- 109)；材料学重点学科(XZD0814–09–1)；西华大学研究生创新基金(YCJJ201257)资助项目。

作者简介：

第一作者：徐琴(1988—)，女，硕士研究生。通信作者：丁士华(1963—)，男，博士，教授。

参考文献：

参考文献：
[1] LINES M E, GLASS A M. Principles and application of ferroelectrics and related materials [M]. Oxford: Oxford University Press, 1977: 24l–250.
[2] WANG Y, LI L, QI J, et a1. Ferroelectric characteristics of ytterbium- doped barium zirconium titanate ceramics [J]. Int Ceram J, 2002, 28(3): 657–661.
[3] 李波, 周晓华, 张树人. 稀土掺杂对还原烧结钛酸钡陶瓷微观结构和电性能的影响[J]. 硅酸盐学报, 2008, 36(3): 277–282.
LI Bo, ZHOU Xiaohua, ZHANG Shuren. J Chin Ceram Soc, 2008, 36(3): 277–282.
[4] BAHRI F, KHEMAKHEM H, SIMON A, et al. Dielectric and pyroelectric studies on the Ba1−3aBi2aTiO3 classical and relaxor ferroelectric ceramics [J]. Solid State Sci, 2003, 5: 1235–1238.
[5] WEI Xiaoyong, FENG Yujun, YAO Xi. Dielectric relaxation behavior in barium stannate titanate ferroelectric ceramics with diffused phase transition [J]. Appl Phys Lett, 2003, 83(10): 2031–2033.
[6] SHANMING K E, FAN Huiqing, HUANG Haitao. Dielectric dispersion behavior of Ba(ZrxTi1−x)O3 solid solutions with a quasiferroelectric state [J]. J Appl Phys, 2008, 104, 034108: 1–4.
[7] WANG Xiaoli, LI Bo. Dielectric audio-frequency dispersion in Ba(Ti1–x? Snx)O3 ferroelectrics [J]. Solid State Commun, 2009, 149: 537–539.
[8] 王久石, 丁士华, 宋天秀, 等. Ba0.98Bi0.02(Ti0.9Zr0.1)1–xCuxO3陶瓷的介电弛豫特征[J]. 硅酸盐学报, 2011, 39(6): 54–60.
WANG Jiushi, DING Shihua, SONG Tianxiu, et al. J Chin Ceram Soc, 2011, 39(6): 54–60.
[9] DING Shihua, WU Wei, CHEN Tao. Song Tianxiu. Relaxor properties of Ba0.955Li0.09(Ti0.91Zr0.09)O3 ceramic doped with MoO3 [J]. Ferroelectrics, 2009, 384(1): 25–31.
[10] BHASKAR S, REDDY K, et al. Effect of La substitution on the structural and dielectric properties of BaZr0.1Ti0.9O3 ceramics [J]. J Alloy Compd, 2009, 481: 692–696.
[11] KISHI H, KOHZU N, SUGINO J, et al. The effect of rare-earth (La, Sm, Dy, Ho and Er) and Mg on the microstructure in BaTiO3 [J]. J Eur Ceram Soc, 1999, 19: 1043–1046.
[12] SHANNON R D. Revised ejective ionic radii and systematic studies of interatomic distance in halides and chalcogenfdes [J]. Acta Crystallogr, 1976, A32: 751.
[13] STOJANOVIC B D, FOSCHINI C R, ZAGHET M A, et al. Microstructure of doped barium titanate prepared from polymeric precursors [J]. Bol Soc Esp Ceram, 2002, 41(1): 190–193.
[14] PARK Kum–Jin, KIM Chang–Hoon, YOON Yeo–Joo, et al. Doping behaviors of dysprosium, yttrium and holmium in BaTiO3 ceramics [J]. J Eur Ceram Soc, 2009, 29: 1735–1741.
[15] WANG Sen, LI Zhihui, LIU Xin, et al. Influence of Nd2O3 on structure and dielectric property of zirconia barium titanate [J]. Adv Mater Res, 2011, 287–290: 415–419.
[16] SMYTH D M. The Defect Chemistry of Metal Oxides [M]. Xi’an: Xi’an Jiaotong University Press, 2006: 75–85.
[17] SHAIKH Aziz, VEST Robert. Defect structure and dielectric properties of Nd2O3-modified BaTiO3 [J]. J Am Ceram Soc, 1986, 69(6): 689– 694.
[18] COHEN R E. Origin of ferroelectrictricity in perovskite oxides [J]. Nat Lett, 1992, 358(9): 136–137.
[19] KE S M, FAN H Q, HUANG H T, et al. Lorentz–type relationship of the temperature dependence dielectric permittivity in ferroelectrics with diffuse phase transition [J]. Appl Phys Lett, 2008, 93(11): 112906(1–3)
[20] WESTPHAL V, KLEEMANN W, GLINCHUK M D. Diffuse phase transitions and random-field-induced domain states of the ‘‘relaxor’’ ferroelectric PbMg1/3Nb2/3O3 [J]. Phys Rev Lett, 1992, 68(6): 847–850.
[21] WANG Xiaoli, LI Bo. Dielectric audio-frequency dispersion in Ba(Ti1–xSnx)O3 ferroelectrics [J]. Solid State Commun, 2009, 149: 537–539.

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